Existing hollow board beam bridge bearing separation consolidating structure and construction method

Abstract

The invention discloses a structure for consolidating existing hollow board beam bridge bearing separation with a board beam formed by multiple hollow boards, and a construction method thereof. Concrete of a bridge deck cast-in-situ layer, a hinged joint and hollow board roofs on each beam end is chiseled off; the bridge deck cast-in-situ layer, the hinged joint and hollow board end part hollow parts, which are subjected to concrete chiseling, are cast by steel fiber concrete at a time to form an end cross beam; prestressed reinforcement is arranged in the end beam; each beam end is supported by two bearings. A reinforced hollow board beam bridge beam end support system is changed from a multiple indeterminate structure to a statically determinate structure, and the bearings are clear in force bearing and are involved in force bearing, so that the bearing separation problem is solved fundamentally; the integral rigidity of the hollow boards is improved, the force bearing is uniform, the local stress of each hinged joint on one beam end is reduced, each hinged joint is not easy to damage, the occurrence of the single board force-bearing phenomenon is avoided, and the service life of a bridge is effectively ensured.

Description

technical field [0001] The invention relates to highway bridges, in particular to a hollow reinforcement structure and construction method for existing hollow slab girder bridge supports. Background technique [0002] Hollow slab girder bridge is one of the most commonly used structural forms of small-span bridges of 10-20m. Most of them are simply supported beams, which are suitable for factory mass production and assembly construction. Hinged joints, after the erection of the hollow slabs, the hinged joints are poured together with the concrete of the cast-in-place layer of the bridge deck, and multiple hollow slabs, hinged joints and the cast-in-place layer of the bridge deck form a whole to bear loads such as vehicles. [0003] However, the existing hollow slab girder bridge often suffers from the failure of the support to be empty. The main reasons are as follows: 1. A single hollow slab is supported by 4 rubber bearings, and each span bridge is composed of multiple hol...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an existing hollow slab girder bridge support support structure, so as to effectively solve the problem that the existing multi-support hollow slab gird...

Images